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authorgdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4>2013-08-19 14:07:53 +0000
committergdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4>2013-08-19 14:07:53 +0000
commit58f8d8a051580add16ede4c74ae5e24e5f4bb45e (patch)
treeca271f96c15dce684e2b5acb9078091b35962242 /demos/ARMCM3-STM32F100-DISCOVERY/main.c
parent1003ac4c256575f760cfdcada7ebbcb0f03d9f90 (diff)
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Diffstat (limited to 'demos/ARMCM3-STM32F100-DISCOVERY/main.c')
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diff --git a/demos/ARMCM3-STM32F100-DISCOVERY/main.c b/demos/ARMCM3-STM32F100-DISCOVERY/main.c
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--- a/demos/ARMCM3-STM32F100-DISCOVERY/main.c
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@@ -1,235 +0,0 @@
-/*
- ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
-
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
-*/
-
-#include "ch.h"
-#include "hal.h"
-#include "test.h"
-
-static void pwmpcb(PWMDriver *pwmp);
-static void adccb(ADCDriver *adcp, adcsample_t *buffer, size_t n);
-static void spicb(SPIDriver *spip);
-
-/* Total number of channels to be sampled by a single ADC operation.*/
-#define ADC_GRP1_NUM_CHANNELS 2
-
-/* Depth of the conversion buffer, channels are sampled four times each.*/
-#define ADC_GRP1_BUF_DEPTH 4
-
-/*
- * ADC samples buffer.
- */
-static adcsample_t samples[ADC_GRP1_NUM_CHANNELS * ADC_GRP1_BUF_DEPTH];
-
-/*
- * ADC conversion group.
- * Mode: Linear buffer, 4 samples of 2 channels, SW triggered.
- * Channels: IN10 (41.5 cycles sample time)
- * Sensor (239.5 cycles sample time)
- */
-static const ADCConversionGroup adcgrpcfg = {
- FALSE,
- ADC_GRP1_NUM_CHANNELS,
- adccb,
- NULL,
- /* HW dependent part.*/
- 0,
- ADC_CR2_TSVREFE,
- ADC_SMPR1_SMP_AN10(ADC_SAMPLE_41P5) | ADC_SMPR1_SMP_SENSOR(ADC_SAMPLE_239P5),
- 0,
- ADC_SQR1_NUM_CH(ADC_GRP1_NUM_CHANNELS),
- 0,
- ADC_SQR3_SQ2_N(ADC_CHANNEL_IN10) | ADC_SQR3_SQ1_N(ADC_CHANNEL_SENSOR)
-};
-
-/*
- * PWM configuration structure.
- * Cyclic callback enabled, channels 3 and 4 enabled without callbacks,
- * the active state is a logic one.
- */
-static PWMConfig pwmcfg = {
- 10000, /* 10kHz PWM clock frequency. */
- 10000, /* PWM period 1S (in ticks). */
- pwmpcb,
- {
- {PWM_OUTPUT_DISABLED, NULL},
- {PWM_OUTPUT_DISABLED, NULL},
- {PWM_OUTPUT_ACTIVE_HIGH, NULL},
- {PWM_OUTPUT_ACTIVE_HIGH, NULL}
- },
- /* HW dependent part.*/
- 0,
-#if STM32_PWM_USE_ADVANCED
- 0
-#endif
-};
-
-/*
- * SPI configuration structure.
- * Maximum speed (12MHz), CPHA=0, CPOL=0, 16bits frames, MSb transmitted first.
- * The slave select line is the pin GPIOA_SPI1NSS on the port GPIOA.
- */
-static const SPIConfig spicfg = {
- spicb,
- /* HW dependent part.*/
- GPIOA,
- GPIOA_SPI1NSS,
- SPI_CR1_DFF
-};
-
-/*
- * PWM cyclic callback.
- * A new ADC conversion is started.
- */
-static void pwmpcb(PWMDriver *pwmp) {
-
- (void)pwmp;
-
- /* Starts an asynchronous ADC conversion operation, the conversion
- will be executed in parallel to the current PWM cycle and will
- terminate before the next PWM cycle.*/
- chSysLockFromIsr();
- adcStartConversionI(&ADCD1, &adcgrpcfg, samples, ADC_GRP1_BUF_DEPTH);
- chSysUnlockFromIsr();
-}
-
-/*
- * ADC end conversion callback.
- * The PWM channels are reprogrammed using the latest ADC samples.
- * The latest samples are transmitted into a single SPI transaction.
- */
-void adccb(ADCDriver *adcp, adcsample_t *buffer, size_t n) {
-
- (void) buffer; (void) n;
- /* Note, only in the ADC_COMPLETE state because the ADC driver fires an
- intermediate callback when the buffer is half full.*/
- if (adcp->state == ADC_COMPLETE) {
- adcsample_t avg_ch1, avg_ch2;
-
- /* Calculates the average values from the ADC samples.*/
- avg_ch1 = (samples[0] + samples[2] + samples[4] + samples[6]) / 4;
- avg_ch2 = (samples[1] + samples[3] + samples[5] + samples[7]) / 4;
-
- chSysLockFromIsr();
-
- /* Changes the channels pulse width, the change will be effective
- starting from the next cycle.*/
- pwmEnableChannelI(&PWMD3, 2, PWM_FRACTION_TO_WIDTH(&PWMD3, 4096, avg_ch1));
- pwmEnableChannelI(&PWMD3, 3, PWM_FRACTION_TO_WIDTH(&PWMD3, 4096, avg_ch2));
-
- /* SPI slave selection and transmission start.*/
- spiSelectI(&SPID1);
- spiStartSendI(&SPID1, ADC_GRP1_NUM_CHANNELS * ADC_GRP1_BUF_DEPTH, samples);
-
- chSysUnlockFromIsr();
- }
-}
-
-/*
- * SPI end transfer callback.
- */
-static void spicb(SPIDriver *spip) {
-
- /* On transfer end just releases the slave select line.*/
- chSysLockFromIsr();
- spiUnselectI(spip);
- chSysUnlockFromIsr();
-}
-
-/*
- * This is a periodic thread that does absolutely nothing except increasing
- * a seconds counter.
- */
-static WORKING_AREA(waThread1, 128);
-static msg_t Thread1(void *arg) {
- static uint32_t seconds_counter;
-
- (void)arg;
- chRegSetThreadName("counter");
- while (TRUE) {
- chThdSleepMilliseconds(1000);
- seconds_counter++;
- }
-}
-
-/*
- * Application entry point.
- */
-int main(void) {
-
- /*
- * System initializations.
- * - HAL initialization, this also initializes the configured device drivers
- * and performs the board-specific initializations.
- * - Kernel initialization, the main() function becomes a thread and the
- * RTOS is active.
- */
- halInit();
- chSysInit();
-
- /*
- * Activates the serial driver 1 using the driver default configuration.
- */
- sdStart(&SD1, NULL);
-
- /*
- * If the user button is pressed after the reset then the test suite is
- * executed immediately before activating the various device drivers in
- * order to not alter the benchmark scores.
- */
- if (palReadPad(GPIOA, GPIOA_BUTTON))
- TestThread(&SD1);
-
- /*
- * Initializes the SPI driver 1.
- */
- spiStart(&SPID1, &spicfg);
-
- /*
- * Initializes the ADC driver 1.
- * The pin PC0 on the port GPIOC is programmed as analog input.
- */
- adcStart(&ADCD1, NULL);
- palSetGroupMode(GPIOC, PAL_PORT_BIT(0), 0, PAL_MODE_INPUT_ANALOG);
-
- /*
- * Initializes the PWM driver 3, re-routes the TIM3 outputs, programs the
- * pins as alternate functions.
- * Note, the AFIO access routes the TIM3 output pins on the PC6...PC9
- * where the LEDs are connected.
- */
- pwmStart(&PWMD3, &pwmcfg);
- AFIO->MAPR |= AFIO_MAPR_TIM3_REMAP_0 | AFIO_MAPR_TIM3_REMAP_1;
- palSetGroupMode(GPIOC, PAL_PORT_BIT(GPIOC_LED3) | PAL_PORT_BIT(GPIOC_LED4),
- 0,
- PAL_MODE_STM32_ALTERNATE_PUSHPULL);
-
- /*
- * Creates the example thread.
- */
- chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO, Thread1, NULL);
-
- /*
- * Normal main() thread activity, in this demo it does nothing except
- * sleeping in a loop and check the button state, when the button is
- * pressed the test procedure is launched with output on the serial
- * driver 1.
- */
- while (TRUE) {
- if (palReadPad(GPIOA, GPIOA_BUTTON))
- TestThread(&SD1);
- chThdSleepMilliseconds(500);
- }
-}